Mastervolt Mass Combi 12/4000-200 120V Inverter/Charger - 37014005

SKU: EX 37014005

1-2 weeks delivery time

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The Mastervolt Mass Combi 12/4000-200 (item no. 37014005) is a heavy-duty 120 V inverter/charger delivering 3750 W continuous power (7500 W peak) and up to 200 A of smart 3-step+ battery charging. Designed for demanding industrial, marine, and mobile environments, this model supports both AC input sources and integrates into MasterBus systems via optional interface. Despite its high capacity, it remains compact (496 x 318 x 279 mm) and features silent high-frequency operation, dual AC outputs, and enhanced load balancing with Power Assist functionality.

Description
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Mastervolt 37014005 - Mass Combi 12/4000-200 Inverter/Charger (120V, 3750W, 200A) – High-Capacity, MasterBus Ready

The Mastervolt Mass Combi 12/4000-200 (product code: 37014005) is a high-capacity inverter/charger designed for professional-grade off-grid systems operating at 120 V / 60 Hz. With 3750 W continuous inverter power (7500 W peak) and a 200 A 3-step+ battery charger, it serves both starter and service batteries. The unit provides clean sine wave power, robust AC transfer, and MasterBus compatibility for smart system integration. Ideal for RV, marine, and industrial energy needs.

Key Features

True sine wave inverter: 3750 W continuous / 7500 W peak
High-efficiency 200 A charger with dual 5 A auxiliary outputs
Power Assist: supports loads exceeding grid/generator supply
Separate AC outputs for critical and heavy loads
HF design: compact, lightweight and silent (no transformer hum)
Supports mains/generator sync (120 V / 60 Hz)
MasterBus integration ready (interface required)
Dimensions: 496 x 318 x 279 mm; weight: 21 kg

Specifications – Inverter

Nominal DC Voltage	12 V (range 10–15 V)
Output Voltage	120 V ± 5%, 60 Hz ±0.05%
Waveform	True sine wave
Continuous Power	3750 W @ 25°C
Peak Load	7500 W
Efficiency	≥ 90%
DC Ripple	< 5%
Energy Saving Mode	1 W
Parallel Operation	No
3-Phase Support	No
Grid/Generator Sync	Yes

Specifications – Battery Charger

Input Voltage Range	90–135 V AC
Input Current (Max)	29 A
Charge Current	200 A @ 14.25 V (adjustable)
Secondary Output	2 × 12 V / 5 A
Power Consumption (Full Load)	29 A / 3400 W
No-load Consumption	< 30 W
Battery Temp Sensor	Included
Voltage Sensing	Automatic compensation
Charging Algorithm	IUoUo / 3-step+ for Gel, AGM, MLI, flooded, traction

Specifications – Transfer System

AC Input	50 A (25 A switched)
AC Output 1	25 A (short break)
AC Output 2	50 A (main)
Transfer Time	~10 ms typical
Voltage Range	90–135 V
Frequency Range	45–65 Hz